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1ce46cfe JG |
1 | /* |
2 | * Copyright (C) 2017 - Jérémie Galarneau <jeremie.galarneau@efficios.com> | |
3 | * | |
4 | * This library is free software; you can redistribute it and/or modify it | |
5 | * under the terms of the GNU Lesser General Public License, version 2.1 only, | |
6 | * as published by the Free Software Foundation. | |
7 | * | |
8 | * This library is distributed in the hope that it will be useful, but WITHOUT | |
9 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
10 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License | |
11 | * for more details. | |
12 | * | |
13 | * You should have received a copy of the GNU Lesser General Public License | |
14 | * along with this library; if not, write to the Free Software Foundation, | |
15 | * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA | |
16 | */ | |
17 | ||
18 | #include <assert.h> | |
19 | #include <common/error.h> | |
20 | #include <common/macros.h> | |
21 | #include <common/compat/string.h> | |
22 | #include <fcntl.h> | |
23 | #include <lttng/constant.h> | |
24 | #include <lttng/userspace-probe-internal.h> | |
25 | ||
26 | enum lttng_userspace_probe_location_lookup_method_type | |
27 | lttng_userspace_probe_location_lookup_method_get_type( | |
28 | const struct lttng_userspace_probe_location_lookup_method *lookup_method) | |
29 | { | |
30 | return lookup_method ? lookup_method->type : | |
31 | LTTNG_USERSPACE_PROBE_LOCATION_LOOKUP_METHOD_TYPE_UNKNOWN; | |
32 | } | |
33 | ||
34 | void lttng_userspace_probe_location_lookup_method_destroy( | |
35 | struct lttng_userspace_probe_location_lookup_method *lookup_method) | |
36 | { | |
37 | if (!lookup_method){ | |
38 | return; | |
39 | } | |
40 | ||
5d21f143 | 41 | free(lookup_method); |
1ce46cfe JG |
42 | } |
43 | ||
44 | struct lttng_userspace_probe_location_lookup_method * | |
45 | lttng_userspace_probe_location_lookup_method_function_elf_create(void) | |
46 | { | |
47 | struct lttng_userspace_probe_location_lookup_method *ret = NULL; | |
48 | struct lttng_userspace_probe_location_lookup_method_elf *elf_method; | |
49 | ||
50 | elf_method = zmalloc(sizeof(*elf_method)); | |
51 | if (!elf_method) { | |
52 | PERROR("zmalloc"); | |
53 | goto end; | |
54 | } | |
55 | ||
56 | ret = &elf_method->parent; | |
57 | ret->type = LTTNG_USERSPACE_PROBE_LOCATION_LOOKUP_METHOD_TYPE_FUNCTION_ELF; | |
58 | end: | |
59 | return ret; | |
60 | } | |
61 | ||
f4d0bb2e FD |
62 | struct lttng_userspace_probe_location_lookup_method * |
63 | lttng_userspace_probe_location_lookup_method_tracepoint_sdt_create(void) | |
64 | { | |
65 | struct lttng_userspace_probe_location_lookup_method *ret = NULL; | |
66 | struct lttng_userspace_probe_location_lookup_method_sdt *sdt_method; | |
67 | ||
68 | sdt_method = zmalloc(sizeof(*sdt_method)); | |
69 | if (!sdt_method) { | |
70 | PERROR("zmalloc"); | |
71 | goto end; | |
72 | } | |
73 | ||
74 | ret = &sdt_method->parent; | |
75 | ret->type = LTTNG_USERSPACE_PROBE_LOCATION_LOOKUP_METHOD_TYPE_TRACEPOINT_SDT; | |
76 | end: | |
77 | return ret; | |
78 | } | |
79 | ||
1ce46cfe JG |
80 | enum lttng_userspace_probe_location_type lttng_userspace_probe_location_get_type( |
81 | const struct lttng_userspace_probe_location *location) | |
82 | { | |
83 | return location ? location->type : | |
84 | LTTNG_USERSPACE_PROBE_LOCATION_TYPE_UNKNOWN; | |
85 | } | |
86 | ||
87 | static | |
88 | void lttng_userspace_probe_location_function_destroy( | |
89 | struct lttng_userspace_probe_location *location) | |
90 | { | |
91 | struct lttng_userspace_probe_location_function *location_function = NULL; | |
92 | ||
93 | assert(location); | |
94 | ||
95 | location_function = container_of(location, | |
96 | struct lttng_userspace_probe_location_function, parent); | |
97 | ||
98 | assert(location_function); | |
99 | ||
100 | free(location_function->function_name); | |
101 | free(location_function->binary_path); | |
102 | if (location_function->binary_fd >= 0) { | |
103 | if (close(location_function->binary_fd)) { | |
104 | PERROR("close"); | |
105 | } | |
106 | } | |
107 | free(location); | |
108 | } | |
109 | ||
f4d0bb2e FD |
110 | static |
111 | void lttng_userspace_probe_location_tracepoint_destroy( | |
112 | struct lttng_userspace_probe_location *location) | |
113 | { | |
114 | struct lttng_userspace_probe_location_tracepoint *location_tracepoint = NULL; | |
115 | ||
116 | assert(location); | |
117 | ||
118 | location_tracepoint = container_of(location, | |
119 | struct lttng_userspace_probe_location_tracepoint, | |
120 | parent); | |
121 | ||
122 | assert(location_tracepoint); | |
123 | ||
124 | free(location_tracepoint->probe_name); | |
125 | free(location_tracepoint->provider_name); | |
126 | free(location_tracepoint->binary_path); | |
127 | if (location_tracepoint->binary_fd >= 0) { | |
128 | if (close(location_tracepoint->binary_fd)) { | |
129 | PERROR("close"); | |
130 | } | |
131 | } | |
132 | free(location); | |
133 | } | |
134 | ||
1ce46cfe JG |
135 | void lttng_userspace_probe_location_destroy( |
136 | struct lttng_userspace_probe_location *location) | |
137 | { | |
138 | if (!location) { | |
139 | return; | |
140 | } | |
141 | ||
142 | lttng_userspace_probe_location_lookup_method_destroy( | |
143 | location->lookup_method); | |
144 | ||
145 | switch (location->type) { | |
146 | case LTTNG_USERSPACE_PROBE_LOCATION_TYPE_FUNCTION: | |
147 | lttng_userspace_probe_location_function_destroy(location); | |
148 | break; | |
f4d0bb2e FD |
149 | case LTTNG_USERSPACE_PROBE_LOCATION_TYPE_TRACEPOINT: |
150 | lttng_userspace_probe_location_tracepoint_destroy(location); | |
151 | break; | |
1ce46cfe | 152 | default: |
adf53c67 | 153 | abort(); |
1ce46cfe JG |
154 | } |
155 | } | |
156 | ||
157 | static struct lttng_userspace_probe_location * | |
158 | lttng_userspace_probe_location_function_create_no_check(const char *binary_path, | |
159 | const char *function_name, | |
160 | struct lttng_userspace_probe_location_lookup_method *lookup_method, | |
161 | bool open_binary) | |
162 | { | |
163 | int binary_fd = -1; | |
164 | char *function_name_copy = NULL, *binary_path_copy = NULL; | |
165 | struct lttng_userspace_probe_location *ret = NULL; | |
166 | struct lttng_userspace_probe_location_function *location; | |
167 | ||
168 | if (open_binary) { | |
169 | binary_fd = open(binary_path, O_RDONLY); | |
170 | if (binary_fd < 0) { | |
171 | PERROR("Error opening the binary"); | |
172 | goto error; | |
173 | } | |
174 | } else { | |
175 | binary_fd = -1; | |
176 | } | |
177 | ||
178 | function_name_copy = lttng_strndup(function_name, LTTNG_SYMBOL_NAME_LEN); | |
179 | if (!function_name_copy) { | |
180 | PERROR("Error duplicating the function name"); | |
181 | goto error; | |
182 | } | |
183 | ||
184 | binary_path_copy = lttng_strndup(binary_path, LTTNG_PATH_MAX); | |
185 | if (!binary_path_copy) { | |
186 | PERROR("Error duplicating the function name"); | |
187 | goto error; | |
188 | } | |
189 | ||
190 | location = zmalloc(sizeof(*location)); | |
191 | if (!location) { | |
192 | PERROR("Error allocating userspace probe location"); | |
193 | goto error; | |
194 | } | |
195 | ||
196 | location->function_name = function_name_copy; | |
197 | location->binary_path = binary_path_copy; | |
198 | location->binary_fd = binary_fd; | |
9d3981b5 JG |
199 | location->instrumentation_type = |
200 | LTTNG_USERSPACE_PROBE_LOCATION_FUNCTION_INSTRUMENTATION_TYPE_ENTRY; | |
1ce46cfe JG |
201 | |
202 | ret = &location->parent; | |
203 | ret->lookup_method = lookup_method; | |
204 | ret->type = LTTNG_USERSPACE_PROBE_LOCATION_TYPE_FUNCTION; | |
205 | goto end; | |
206 | ||
207 | error: | |
208 | free(function_name_copy); | |
209 | free(binary_path_copy); | |
210 | if (binary_fd >= 0) { | |
211 | if (close(binary_fd)) { | |
212 | PERROR("Error closing binary fd in error path"); | |
213 | } | |
214 | } | |
215 | end: | |
216 | return ret; | |
217 | } | |
218 | ||
f4d0bb2e FD |
219 | static struct lttng_userspace_probe_location * |
220 | lttng_userspace_probe_location_tracepoint_create_no_check(const char *binary_path, | |
221 | const char *provider_name, const char *probe_name, | |
222 | struct lttng_userspace_probe_location_lookup_method *lookup_method, | |
223 | bool open_binary) | |
224 | { | |
225 | int binary_fd = -1; | |
226 | char *probe_name_copy = NULL; | |
227 | char *provider_name_copy = NULL; | |
228 | char *binary_path_copy = NULL; | |
229 | struct lttng_userspace_probe_location *ret = NULL; | |
230 | struct lttng_userspace_probe_location_tracepoint *location; | |
231 | ||
232 | if (open_binary) { | |
233 | binary_fd = open(binary_path, O_RDONLY); | |
234 | if (binary_fd < 0) { | |
235 | PERROR("open"); | |
236 | goto error; | |
237 | } | |
238 | } else { | |
239 | binary_fd = -1; | |
240 | } | |
241 | ||
242 | probe_name_copy = lttng_strndup(probe_name, LTTNG_SYMBOL_NAME_LEN); | |
243 | if (!probe_name_copy) { | |
244 | PERROR("lttng_strndup"); | |
245 | goto error; | |
246 | } | |
247 | ||
248 | provider_name_copy = lttng_strndup(provider_name, LTTNG_SYMBOL_NAME_LEN); | |
249 | if (!provider_name_copy) { | |
250 | PERROR("lttng_strndup"); | |
251 | goto error; | |
252 | } | |
253 | ||
254 | binary_path_copy = lttng_strndup(binary_path, LTTNG_PATH_MAX); | |
255 | if (!binary_path_copy) { | |
256 | PERROR("lttng_strndup"); | |
257 | goto error; | |
258 | } | |
259 | ||
260 | location = zmalloc(sizeof(*location)); | |
261 | if (!location) { | |
262 | PERROR("zmalloc"); | |
263 | goto error; | |
264 | } | |
265 | ||
266 | location->probe_name = probe_name_copy; | |
267 | location->provider_name = provider_name_copy; | |
268 | location->binary_path = binary_path_copy; | |
269 | location->binary_fd = binary_fd; | |
270 | ||
271 | ret = &location->parent; | |
272 | ret->lookup_method = lookup_method; | |
273 | ret->type = LTTNG_USERSPACE_PROBE_LOCATION_TYPE_TRACEPOINT; | |
274 | goto end; | |
275 | ||
276 | error: | |
277 | free(probe_name_copy); | |
278 | free(provider_name_copy); | |
279 | if (binary_fd >= 0) { | |
280 | if (close(binary_fd)) { | |
281 | PERROR("Error closing binary fd in error path"); | |
282 | } | |
283 | } | |
284 | end: | |
285 | return ret; | |
286 | } | |
287 | ||
1ce46cfe JG |
288 | struct lttng_userspace_probe_location * |
289 | lttng_userspace_probe_location_function_create(const char *binary_path, | |
290 | const char *function_name, | |
291 | struct lttng_userspace_probe_location_lookup_method *lookup_method) | |
292 | { | |
293 | struct lttng_userspace_probe_location *ret = NULL; | |
294 | ||
295 | if (!binary_path || !function_name) { | |
296 | ERR("Invalid argument(s)"); | |
297 | goto end; | |
298 | } | |
299 | ||
300 | switch (lttng_userspace_probe_location_lookup_method_get_type( | |
301 | lookup_method)) { | |
302 | case LTTNG_USERSPACE_PROBE_LOCATION_LOOKUP_METHOD_TYPE_FUNCTION_DEFAULT: | |
303 | case LTTNG_USERSPACE_PROBE_LOCATION_LOOKUP_METHOD_TYPE_FUNCTION_ELF: | |
304 | break; | |
305 | default: | |
306 | /* Invalid probe location lookup method. */ | |
307 | goto end; | |
308 | } | |
309 | ||
310 | ret = lttng_userspace_probe_location_function_create_no_check( | |
311 | binary_path, function_name, lookup_method, true); | |
312 | end: | |
313 | return ret; | |
314 | } | |
315 | ||
f4d0bb2e FD |
316 | struct lttng_userspace_probe_location * |
317 | lttng_userspace_probe_location_tracepoint_create(const char *binary_path, | |
318 | const char *provider_name, const char *probe_name, | |
319 | struct lttng_userspace_probe_location_lookup_method *lookup_method) | |
320 | { | |
321 | struct lttng_userspace_probe_location *ret = NULL; | |
322 | ||
323 | if (!binary_path || !probe_name || !provider_name) { | |
324 | ERR("Invalid argument(s)"); | |
325 | goto end; | |
326 | } | |
327 | ||
328 | switch (lttng_userspace_probe_location_lookup_method_get_type( | |
329 | lookup_method)) { | |
330 | case LTTNG_USERSPACE_PROBE_LOCATION_LOOKUP_METHOD_TYPE_TRACEPOINT_SDT: | |
331 | break; | |
332 | default: | |
333 | /* Invalid probe location lookup method. */ | |
334 | goto end; | |
335 | } | |
336 | ||
337 | ret = lttng_userspace_probe_location_tracepoint_create_no_check( | |
338 | binary_path, provider_name, probe_name, lookup_method, true); | |
339 | end: | |
340 | return ret; | |
341 | } | |
342 | ||
394357fe FD |
343 | static struct lttng_userspace_probe_location_lookup_method * |
344 | lttng_userspace_probe_location_lookup_method_function_elf_copy( | |
345 | const struct lttng_userspace_probe_location_lookup_method *lookup_method) | |
346 | { | |
347 | struct lttng_userspace_probe_location_lookup_method *parent = NULL; | |
348 | struct lttng_userspace_probe_location_lookup_method_elf *elf_method; | |
349 | ||
350 | assert(lookup_method); | |
351 | assert(lookup_method->type == | |
352 | LTTNG_USERSPACE_PROBE_LOCATION_LOOKUP_METHOD_TYPE_FUNCTION_ELF); | |
353 | ||
354 | elf_method = zmalloc(sizeof(*elf_method)); | |
355 | if (!elf_method) { | |
356 | PERROR("Error allocating ELF userspace probe lookup method"); | |
357 | goto error; | |
358 | } | |
359 | ||
360 | elf_method->parent.type = lookup_method->type; | |
361 | parent = &elf_method->parent; | |
362 | ||
363 | goto end; | |
364 | error: | |
365 | parent = NULL; | |
366 | end: | |
367 | return parent; | |
368 | } | |
369 | ||
f4d0bb2e FD |
370 | static struct lttng_userspace_probe_location_lookup_method * |
371 | lttng_userspace_probe_location_lookup_method_tracepoint_sdt_copy( | |
372 | struct lttng_userspace_probe_location_lookup_method *lookup_method) | |
373 | { | |
374 | struct lttng_userspace_probe_location_lookup_method *parent = NULL; | |
375 | struct lttng_userspace_probe_location_lookup_method_sdt *sdt_method; | |
376 | ||
377 | assert(lookup_method); | |
378 | assert(lookup_method->type == | |
379 | LTTNG_USERSPACE_PROBE_LOCATION_LOOKUP_METHOD_TYPE_TRACEPOINT_SDT); | |
380 | ||
381 | sdt_method = zmalloc(sizeof(*sdt_method)); | |
382 | if (!sdt_method) { | |
383 | PERROR("zmalloc"); | |
384 | goto error; | |
385 | } | |
386 | ||
387 | sdt_method->parent.type = lookup_method->type; | |
388 | parent = &sdt_method->parent; | |
389 | ||
390 | goto end; | |
391 | ||
392 | error: | |
393 | parent = NULL; | |
394 | end: | |
395 | return parent; | |
396 | } | |
397 | ||
394357fe FD |
398 | static struct lttng_userspace_probe_location * |
399 | lttng_userspace_probe_location_function_copy( | |
400 | const struct lttng_userspace_probe_location *location) | |
401 | { | |
402 | enum lttng_userspace_probe_location_lookup_method_type lookup_type; | |
403 | struct lttng_userspace_probe_location *new_location = NULL; | |
404 | struct lttng_userspace_probe_location_lookup_method *lookup_method = NULL; | |
cc831309 FD |
405 | const char *binary_path = NULL; |
406 | const char *function_name = NULL; | |
d7ee7196 | 407 | int fd, new_fd; |
394357fe FD |
408 | |
409 | assert(location); | |
410 | assert(location->type == LTTNG_USERSPACE_PROBE_LOCATION_TYPE_FUNCTION); | |
411 | ||
cc831309 FD |
412 | /* Get probe location fields */ |
413 | binary_path = lttng_userspace_probe_location_function_get_binary_path(location); | |
394357fe | 414 | if (!binary_path) { |
cc831309 | 415 | ERR("Userspace probe binary path is NULL"); |
394357fe FD |
416 | goto error; |
417 | } | |
418 | ||
cc831309 | 419 | function_name = lttng_userspace_probe_location_function_get_function_name(location); |
394357fe | 420 | if (!function_name) { |
cc831309 | 421 | ERR("Userspace probe function name is NULL"); |
394357fe FD |
422 | goto error; |
423 | } | |
424 | ||
425 | /* Duplicate the binary fd */ | |
d7ee7196 | 426 | fd = lttng_userspace_probe_location_function_get_binary_fd(location); |
394357fe | 427 | if (fd == -1) { |
d7ee7196 FD |
428 | ERR("Error getting file descriptor to binary"); |
429 | goto error; | |
430 | } | |
431 | ||
432 | new_fd = dup(fd); | |
433 | if (new_fd == -1) { | |
394357fe FD |
434 | PERROR("Error duplicating file descriptor to binary"); |
435 | goto error; | |
436 | } | |
437 | ||
438 | /* | |
439 | * Duplicate probe location method fields | |
440 | */ | |
441 | lookup_type = lttng_userspace_probe_location_lookup_method_get_type( | |
442 | location->lookup_method); | |
443 | switch (lookup_type) { | |
444 | case LTTNG_USERSPACE_PROBE_LOCATION_LOOKUP_METHOD_TYPE_FUNCTION_ELF: | |
445 | lookup_method = | |
446 | lttng_userspace_probe_location_lookup_method_function_elf_copy( | |
447 | location->lookup_method); | |
448 | if (!lookup_method) { | |
449 | goto close_fd; | |
450 | } | |
451 | break; | |
452 | default: | |
453 | /* Invalid probe location lookup method. */ | |
454 | goto close_fd; | |
455 | } | |
456 | ||
457 | /* Create the probe_location */ | |
458 | new_location = lttng_userspace_probe_location_function_create_no_check( | |
cc831309 | 459 | binary_path, function_name, lookup_method, false); |
394357fe FD |
460 | if (!new_location) { |
461 | goto destroy_lookup_method; | |
462 | } | |
463 | ||
464 | /* Set the duplicated fd to the new probe_location */ | |
d7ee7196 | 465 | if (lttng_userspace_probe_location_function_set_binary_fd(new_location, new_fd) < 0) { |
394357fe FD |
466 | goto destroy_probe_location; |
467 | } | |
468 | ||
469 | goto end; | |
470 | ||
471 | destroy_probe_location: | |
472 | lttng_userspace_probe_location_destroy(new_location); | |
473 | destroy_lookup_method: | |
474 | lttng_userspace_probe_location_lookup_method_destroy(lookup_method); | |
475 | close_fd: | |
d7ee7196 | 476 | if (close(new_fd) < 0) { |
394357fe FD |
477 | PERROR("Error closing duplicated file descriptor in error path"); |
478 | } | |
479 | error: | |
394357fe FD |
480 | new_location = NULL; |
481 | end: | |
482 | return new_location; | |
483 | } | |
484 | ||
f4d0bb2e FD |
485 | static struct lttng_userspace_probe_location * |
486 | lttng_userspace_probe_location_tracepoint_copy( | |
487 | const struct lttng_userspace_probe_location *location) | |
488 | { | |
489 | enum lttng_userspace_probe_location_lookup_method_type lookup_type; | |
490 | struct lttng_userspace_probe_location *new_location = NULL; | |
491 | struct lttng_userspace_probe_location_lookup_method *lookup_method = NULL; | |
cc831309 FD |
492 | const char *binary_path = NULL; |
493 | const char *probe_name = NULL; | |
494 | const char *provider_name = NULL; | |
d7ee7196 | 495 | int fd, new_fd; |
f4d0bb2e FD |
496 | |
497 | assert(location); | |
498 | assert(location->type == LTTNG_USERSPACE_PROBE_LOCATION_TYPE_TRACEPOINT); | |
499 | ||
cc831309 FD |
500 | /* Get probe location fields */ |
501 | binary_path = lttng_userspace_probe_location_tracepoint_get_binary_path(location); | |
f4d0bb2e | 502 | if (!binary_path) { |
cc831309 | 503 | ERR("Userspace probe binary path is NULL"); |
f4d0bb2e FD |
504 | goto error; |
505 | } | |
506 | ||
cc831309 | 507 | probe_name = lttng_userspace_probe_location_tracepoint_get_probe_name(location); |
f4d0bb2e | 508 | if (!probe_name) { |
cc831309 | 509 | ERR("Userspace probe probe name is NULL"); |
f4d0bb2e FD |
510 | goto error; |
511 | } | |
512 | ||
cc831309 | 513 | provider_name = lttng_userspace_probe_location_tracepoint_get_provider_name(location); |
f4d0bb2e | 514 | if (!provider_name) { |
cc831309 | 515 | ERR("Userspace probe provider name is NULL"); |
f4d0bb2e FD |
516 | goto error; |
517 | } | |
518 | ||
519 | /* Duplicate the binary fd */ | |
d7ee7196 | 520 | fd = lttng_userspace_probe_location_tracepoint_get_binary_fd(location); |
f4d0bb2e | 521 | if (fd == -1) { |
d7ee7196 FD |
522 | ERR("Error getting file descriptor to binary"); |
523 | goto error; | |
524 | } | |
525 | ||
526 | new_fd = dup(fd); | |
527 | if (new_fd == -1) { | |
cc831309 | 528 | PERROR("Error duplicating file descriptor to binary"); |
f4d0bb2e FD |
529 | goto error; |
530 | } | |
531 | ||
532 | /* | |
533 | * Duplicate probe location method fields | |
534 | */ | |
535 | lookup_type = lttng_userspace_probe_location_lookup_method_get_type( | |
536 | location->lookup_method); | |
537 | switch (lookup_type) { | |
538 | case LTTNG_USERSPACE_PROBE_LOCATION_LOOKUP_METHOD_TYPE_TRACEPOINT_SDT: | |
539 | lookup_method = | |
540 | lttng_userspace_probe_location_lookup_method_tracepoint_sdt_copy( | |
541 | location->lookup_method); | |
542 | if (!lookup_method) { | |
543 | goto close_fd; | |
544 | } | |
545 | break; | |
546 | default: | |
547 | /* Invalid probe location lookup method. */ | |
548 | goto close_fd; | |
549 | } | |
550 | ||
551 | /* Create the probe_location */ | |
552 | new_location = lttng_userspace_probe_location_tracepoint_create_no_check( | |
cc831309 | 553 | binary_path, provider_name, probe_name, lookup_method, false); |
f4d0bb2e FD |
554 | if (!new_location) { |
555 | goto destroy_lookup_method; | |
556 | } | |
557 | ||
558 | /* Set the duplicated fd to the new probe_location */ | |
d7ee7196 | 559 | if (lttng_userspace_probe_location_tracepoint_set_binary_fd(new_location, new_fd) < 0) { |
f4d0bb2e FD |
560 | goto destroy_probe_location; |
561 | } | |
562 | ||
563 | goto end; | |
564 | ||
565 | destroy_probe_location: | |
566 | lttng_userspace_probe_location_destroy(new_location); | |
567 | destroy_lookup_method: | |
568 | lttng_userspace_probe_location_lookup_method_destroy(lookup_method); | |
569 | close_fd: | |
d7ee7196 | 570 | if (close(new_fd) < 0) { |
cc831309 | 571 | PERROR("Error closing duplicated file descriptor in error path"); |
f4d0bb2e FD |
572 | } |
573 | error: | |
f4d0bb2e FD |
574 | new_location = NULL; |
575 | end: | |
576 | return new_location; | |
577 | } | |
578 | ||
1ce46cfe JG |
579 | const char *lttng_userspace_probe_location_function_get_binary_path( |
580 | const struct lttng_userspace_probe_location *location) | |
581 | { | |
582 | const char *ret = NULL; | |
583 | struct lttng_userspace_probe_location_function *function_location; | |
584 | ||
585 | if (!location || lttng_userspace_probe_location_get_type(location) != | |
586 | LTTNG_USERSPACE_PROBE_LOCATION_TYPE_FUNCTION) { | |
587 | ERR("Invalid argument(s)"); | |
588 | goto end; | |
589 | } | |
590 | ||
591 | function_location = container_of(location, | |
592 | struct lttng_userspace_probe_location_function, | |
593 | parent); | |
594 | ret = function_location->binary_path; | |
595 | end: | |
596 | return ret; | |
597 | } | |
598 | ||
f4d0bb2e FD |
599 | const char *lttng_userspace_probe_location_tracepoint_get_binary_path( |
600 | const struct lttng_userspace_probe_location *location) | |
601 | { | |
602 | const char *ret = NULL; | |
603 | struct lttng_userspace_probe_location_tracepoint *tracepoint_location; | |
604 | ||
605 | if (!location || lttng_userspace_probe_location_get_type(location) != | |
606 | LTTNG_USERSPACE_PROBE_LOCATION_TYPE_TRACEPOINT) { | |
607 | ERR("Invalid argument(s)"); | |
608 | goto end; | |
609 | } | |
610 | ||
611 | tracepoint_location = container_of(location, | |
612 | struct lttng_userspace_probe_location_tracepoint, | |
613 | parent); | |
614 | ret = tracepoint_location->binary_path; | |
615 | end: | |
616 | return ret; | |
617 | } | |
618 | ||
1ce46cfe JG |
619 | const char *lttng_userspace_probe_location_function_get_function_name( |
620 | const struct lttng_userspace_probe_location *location) | |
621 | { | |
622 | const char *ret = NULL; | |
623 | struct lttng_userspace_probe_location_function *function_location; | |
624 | ||
625 | if (!location || lttng_userspace_probe_location_get_type(location) != | |
626 | LTTNG_USERSPACE_PROBE_LOCATION_TYPE_FUNCTION) { | |
627 | ERR("Invalid argument(s)"); | |
628 | goto end; | |
629 | } | |
630 | ||
631 | function_location = container_of(location, | |
632 | struct lttng_userspace_probe_location_function, parent); | |
633 | ret = function_location->function_name; | |
634 | end: | |
635 | return ret; | |
636 | } | |
637 | ||
f4d0bb2e FD |
638 | const char *lttng_userspace_probe_location_tracepoint_get_probe_name( |
639 | const struct lttng_userspace_probe_location *location) | |
640 | { | |
641 | const char *ret = NULL; | |
642 | struct lttng_userspace_probe_location_tracepoint *tracepoint_location; | |
643 | ||
644 | if (!location || lttng_userspace_probe_location_get_type(location) != | |
645 | LTTNG_USERSPACE_PROBE_LOCATION_TYPE_TRACEPOINT) { | |
646 | ERR("Invalid argument(s)"); | |
647 | goto end; | |
648 | } | |
649 | ||
650 | tracepoint_location = container_of(location, | |
651 | struct lttng_userspace_probe_location_tracepoint, parent); | |
652 | ret = tracepoint_location->probe_name; | |
653 | end: | |
654 | return ret; | |
655 | } | |
656 | ||
657 | const char *lttng_userspace_probe_location_tracepoint_get_provider_name( | |
658 | const struct lttng_userspace_probe_location *location) | |
659 | { | |
660 | const char *ret = NULL; | |
661 | struct lttng_userspace_probe_location_tracepoint *tracepoint_location; | |
662 | ||
663 | if (!location || lttng_userspace_probe_location_get_type(location) != | |
664 | LTTNG_USERSPACE_PROBE_LOCATION_TYPE_TRACEPOINT) { | |
665 | ERR("Invalid argument(s)"); | |
666 | goto end; | |
667 | } | |
668 | ||
669 | tracepoint_location = container_of(location, | |
670 | struct lttng_userspace_probe_location_tracepoint, parent); | |
671 | ret = tracepoint_location->provider_name; | |
672 | end: | |
673 | return ret; | |
674 | } | |
675 | ||
1ce46cfe JG |
676 | int lttng_userspace_probe_location_function_get_binary_fd( |
677 | const struct lttng_userspace_probe_location *location) | |
678 | { | |
679 | int ret = -1; | |
680 | struct lttng_userspace_probe_location_function *function_location; | |
681 | ||
682 | if (!location || lttng_userspace_probe_location_get_type(location) != | |
683 | LTTNG_USERSPACE_PROBE_LOCATION_TYPE_FUNCTION) { | |
684 | ERR("Invalid argument(s)"); | |
685 | goto end; | |
686 | } | |
687 | ||
688 | function_location = container_of(location, | |
689 | struct lttng_userspace_probe_location_function, parent); | |
690 | ret = function_location->binary_fd; | |
691 | end: | |
692 | return ret; | |
693 | } | |
694 | ||
9d3981b5 JG |
695 | enum lttng_userspace_probe_location_function_instrumentation_type |
696 | lttng_userspace_probe_location_function_get_instrumentation_type( | |
697 | const struct lttng_userspace_probe_location *location) | |
698 | { | |
699 | enum lttng_userspace_probe_location_function_instrumentation_type type; | |
700 | struct lttng_userspace_probe_location_function *function_location; | |
701 | ||
702 | if (!location || lttng_userspace_probe_location_get_type(location) != | |
703 | LTTNG_USERSPACE_PROBE_LOCATION_TYPE_FUNCTION) { | |
704 | ERR("Invalid argument(s)"); | |
705 | type = LTTNG_USERSPACE_PROBE_LOCATION_FUNCTION_INSTRUMENTATION_TYPE_UNKNOWN; | |
706 | goto end; | |
707 | } | |
708 | ||
709 | function_location = container_of(location, | |
710 | struct lttng_userspace_probe_location_function, parent); | |
711 | type = function_location->instrumentation_type; | |
712 | end: | |
713 | return type; | |
714 | } | |
715 | ||
716 | enum lttng_userspace_probe_location_status | |
717 | lttng_userspace_probe_location_function_set_instrumentation_type( | |
718 | const struct lttng_userspace_probe_location *location, | |
719 | enum lttng_userspace_probe_location_function_instrumentation_type instrumentation_type) | |
720 | { | |
721 | enum lttng_userspace_probe_location_status status = | |
722 | LTTNG_USERSPACE_PROBE_LOCATION_STATUS_OK; | |
723 | struct lttng_userspace_probe_location_function *function_location; | |
724 | ||
725 | if (!location || lttng_userspace_probe_location_get_type(location) != | |
726 | LTTNG_USERSPACE_PROBE_LOCATION_TYPE_FUNCTION || | |
727 | instrumentation_type != | |
728 | LTTNG_USERSPACE_PROBE_LOCATION_FUNCTION_INSTRUMENTATION_TYPE_ENTRY) { | |
729 | ERR("Invalid argument(s)"); | |
730 | status = LTTNG_USERSPACE_PROBE_LOCATION_STATUS_INVALID; | |
731 | goto end; | |
732 | } | |
733 | ||
734 | function_location = container_of(location, | |
735 | struct lttng_userspace_probe_location_function, parent); | |
736 | function_location->instrumentation_type = instrumentation_type; | |
737 | end: | |
738 | return status; | |
739 | } | |
740 | ||
f4d0bb2e FD |
741 | int lttng_userspace_probe_location_tracepoint_get_binary_fd( |
742 | const struct lttng_userspace_probe_location *location) | |
743 | { | |
744 | int ret = -1; | |
745 | struct lttng_userspace_probe_location_tracepoint *tracepoint_location; | |
746 | ||
747 | if (!location || lttng_userspace_probe_location_get_type(location) != | |
748 | LTTNG_USERSPACE_PROBE_LOCATION_TYPE_TRACEPOINT) { | |
749 | ERR("Invalid argument(s)"); | |
750 | goto end; | |
751 | } | |
752 | ||
753 | tracepoint_location = container_of(location, | |
754 | struct lttng_userspace_probe_location_tracepoint, parent); | |
755 | ret = tracepoint_location->binary_fd; | |
756 | end: | |
757 | return ret; | |
758 | } | |
759 | ||
1ce46cfe JG |
760 | static struct lttng_userspace_probe_location_lookup_method * |
761 | lttng_userspace_probe_location_function_get_lookup_method( | |
762 | const struct lttng_userspace_probe_location *location) | |
763 | { | |
764 | struct lttng_userspace_probe_location_lookup_method *ret = NULL; | |
765 | ||
766 | if (!location || lttng_userspace_probe_location_get_type(location) != | |
767 | LTTNG_USERSPACE_PROBE_LOCATION_TYPE_FUNCTION) { | |
768 | ERR("Invalid argument(s)"); | |
769 | goto end; | |
770 | } | |
771 | ||
772 | ret = location->lookup_method; | |
773 | end: | |
774 | return ret; | |
775 | } | |
776 | ||
f4d0bb2e FD |
777 | static struct lttng_userspace_probe_location_lookup_method * |
778 | lttng_userspace_probe_location_tracepoint_get_lookup_method( | |
779 | const struct lttng_userspace_probe_location *location) | |
780 | { | |
781 | struct lttng_userspace_probe_location_lookup_method *ret = NULL; | |
782 | ||
783 | if (!location || lttng_userspace_probe_location_get_type(location) != | |
784 | LTTNG_USERSPACE_PROBE_LOCATION_TYPE_TRACEPOINT) { | |
785 | ERR("Invalid argument(s)"); | |
786 | goto end; | |
787 | } | |
788 | ||
789 | ret = location->lookup_method; | |
790 | end: | |
791 | return ret; | |
792 | } | |
793 | ||
87597c2c | 794 | const struct lttng_userspace_probe_location_lookup_method * |
1ce46cfe JG |
795 | lttng_userspace_probe_location_get_lookup_method( |
796 | const struct lttng_userspace_probe_location *location) | |
797 | { | |
798 | struct lttng_userspace_probe_location_lookup_method *ret = NULL; | |
799 | ||
800 | assert(location); | |
801 | switch (location->type) { | |
802 | case LTTNG_USERSPACE_PROBE_LOCATION_TYPE_FUNCTION: | |
803 | ret = lttng_userspace_probe_location_function_get_lookup_method( | |
804 | location); | |
805 | break; | |
f4d0bb2e FD |
806 | case LTTNG_USERSPACE_PROBE_LOCATION_TYPE_TRACEPOINT: |
807 | ret = lttng_userspace_probe_location_tracepoint_get_lookup_method( | |
808 | location); | |
809 | break; | |
1ce46cfe JG |
810 | default: |
811 | ERR("Unknowned lookup method."); | |
812 | break; | |
813 | } | |
814 | return ret; | |
815 | } | |
816 | ||
817 | static | |
818 | int lttng_userspace_probe_location_lookup_method_serialize( | |
819 | struct lttng_userspace_probe_location_lookup_method *method, | |
820 | struct lttng_dynamic_buffer *buffer) | |
821 | { | |
822 | int ret; | |
823 | struct lttng_userspace_probe_location_lookup_method_comm | |
824 | lookup_method_comm; | |
825 | ||
826 | lookup_method_comm.type = (int8_t) (method ? method->type : | |
827 | LTTNG_USERSPACE_PROBE_LOCATION_LOOKUP_METHOD_TYPE_FUNCTION_DEFAULT); | |
828 | if (buffer) { | |
829 | ret = lttng_dynamic_buffer_append(buffer, &lookup_method_comm, | |
830 | sizeof(lookup_method_comm)); | |
831 | if (ret) { | |
832 | goto end; | |
833 | } | |
834 | } | |
f4d0bb2e FD |
835 | ret = sizeof(lookup_method_comm); |
836 | end: | |
837 | return ret; | |
838 | } | |
839 | ||
840 | static | |
841 | int lttng_userspace_probe_location_function_serialize( | |
842 | const struct lttng_userspace_probe_location *location, | |
843 | struct lttng_dynamic_buffer *buffer, | |
844 | int *binary_fd) | |
845 | { | |
846 | int ret; | |
847 | size_t function_name_len, binary_path_len; | |
848 | struct lttng_userspace_probe_location_function *location_function; | |
849 | struct lttng_userspace_probe_location_function_comm location_function_comm; | |
850 | ||
851 | assert(location); | |
852 | assert(lttng_userspace_probe_location_get_type(location) == | |
853 | LTTNG_USERSPACE_PROBE_LOCATION_TYPE_FUNCTION); | |
854 | ||
855 | location_function = container_of(location, | |
856 | struct lttng_userspace_probe_location_function, | |
857 | parent); | |
858 | if (!location_function->function_name || !location_function->binary_path) { | |
859 | ret = -LTTNG_ERR_INVALID; | |
860 | goto end; | |
861 | } | |
862 | ||
863 | if (binary_fd && location_function->binary_fd < 0) { | |
864 | ret = -LTTNG_ERR_INVALID; | |
865 | goto end; | |
866 | } | |
867 | ||
868 | if (binary_fd) { | |
869 | *binary_fd = location_function->binary_fd; | |
870 | } | |
871 | ||
872 | function_name_len = strlen(location_function->function_name); | |
873 | if (function_name_len == 0) { | |
874 | ret = -LTTNG_ERR_INVALID; | |
875 | goto end; | |
876 | } | |
877 | binary_path_len = strlen(location_function->binary_path); | |
878 | if (binary_path_len == 0) { | |
879 | ret = -LTTNG_ERR_INVALID; | |
880 | goto end; | |
881 | } | |
882 | ||
883 | location_function_comm.function_name_len = function_name_len + 1; | |
884 | location_function_comm.binary_path_len = binary_path_len + 1; | |
885 | ||
886 | if (buffer) { | |
887 | ret = lttng_dynamic_buffer_append(buffer, | |
888 | &location_function_comm, | |
889 | sizeof(location_function_comm)); | |
890 | if (ret) { | |
891 | ret = -LTTNG_ERR_INVALID; | |
892 | goto end; | |
893 | } | |
894 | ret = lttng_dynamic_buffer_append(buffer, | |
895 | location_function->function_name, | |
896 | location_function_comm.function_name_len); | |
897 | if (ret) { | |
898 | ret = -LTTNG_ERR_INVALID; | |
899 | goto end; | |
900 | } | |
901 | ret = lttng_dynamic_buffer_append(buffer, | |
902 | location_function->binary_path, | |
903 | location_function_comm.binary_path_len); | |
904 | if (ret) { | |
905 | ret = -LTTNG_ERR_INVALID; | |
906 | goto end; | |
907 | } | |
908 | } | |
909 | ret = sizeof(location_function_comm) + | |
910 | location_function_comm.function_name_len + | |
911 | location_function_comm.binary_path_len; | |
1ce46cfe JG |
912 | end: |
913 | return ret; | |
914 | } | |
915 | ||
916 | static | |
f4d0bb2e | 917 | int lttng_userspace_probe_location_tracepoint_serialize( |
1ce46cfe JG |
918 | const struct lttng_userspace_probe_location *location, |
919 | struct lttng_dynamic_buffer *buffer, | |
920 | int *binary_fd) | |
921 | { | |
922 | int ret; | |
f4d0bb2e FD |
923 | size_t probe_name_len, provider_name_len, binary_path_len; |
924 | struct lttng_userspace_probe_location_tracepoint *location_tracepoint; | |
925 | struct lttng_userspace_probe_location_tracepoint_comm location_tracepoint_comm; | |
1ce46cfe JG |
926 | |
927 | assert(location); | |
928 | assert(lttng_userspace_probe_location_get_type(location) == | |
f4d0bb2e | 929 | LTTNG_USERSPACE_PROBE_LOCATION_TYPE_TRACEPOINT); |
1ce46cfe | 930 | |
f4d0bb2e FD |
931 | location_tracepoint = container_of(location, |
932 | struct lttng_userspace_probe_location_tracepoint, | |
1ce46cfe | 933 | parent); |
f4d0bb2e FD |
934 | if (!location_tracepoint->probe_name || |
935 | !location_tracepoint->provider_name || | |
936 | !location_tracepoint->binary_path) { | |
1ce46cfe JG |
937 | ret = -LTTNG_ERR_INVALID; |
938 | goto end; | |
939 | } | |
940 | ||
f4d0bb2e | 941 | if (binary_fd && location_tracepoint->binary_fd < 0) { |
1ce46cfe JG |
942 | ret = -LTTNG_ERR_INVALID; |
943 | goto end; | |
944 | } | |
945 | ||
946 | if (binary_fd) { | |
f4d0bb2e | 947 | *binary_fd = location_tracepoint->binary_fd; |
1ce46cfe JG |
948 | } |
949 | ||
f4d0bb2e FD |
950 | probe_name_len = strlen(location_tracepoint->probe_name); |
951 | if (probe_name_len == 0) { | |
1ce46cfe JG |
952 | ret = -LTTNG_ERR_INVALID; |
953 | goto end; | |
954 | } | |
f4d0bb2e FD |
955 | |
956 | provider_name_len = strlen(location_tracepoint->provider_name); | |
957 | if (provider_name_len == 0) { | |
958 | ret = -LTTNG_ERR_INVALID; | |
959 | goto end; | |
960 | } | |
961 | ||
962 | binary_path_len = strlen(location_tracepoint->binary_path); | |
1ce46cfe JG |
963 | if (binary_path_len == 0) { |
964 | ret = -LTTNG_ERR_INVALID; | |
965 | goto end; | |
966 | } | |
967 | ||
f4d0bb2e FD |
968 | location_tracepoint_comm.probe_name_len = probe_name_len + 1; |
969 | location_tracepoint_comm.provider_name_len = provider_name_len + 1; | |
970 | location_tracepoint_comm.binary_path_len = binary_path_len + 1; | |
1ce46cfe JG |
971 | |
972 | if (buffer) { | |
973 | ret = lttng_dynamic_buffer_append(buffer, | |
f4d0bb2e FD |
974 | &location_tracepoint_comm, |
975 | sizeof(location_tracepoint_comm)); | |
1ce46cfe JG |
976 | if (ret) { |
977 | ret = -LTTNG_ERR_INVALID; | |
978 | goto end; | |
979 | } | |
980 | ret = lttng_dynamic_buffer_append(buffer, | |
f4d0bb2e FD |
981 | location_tracepoint->probe_name, |
982 | location_tracepoint_comm.probe_name_len); | |
1ce46cfe JG |
983 | if (ret) { |
984 | ret = -LTTNG_ERR_INVALID; | |
985 | goto end; | |
986 | } | |
987 | ret = lttng_dynamic_buffer_append(buffer, | |
f4d0bb2e FD |
988 | location_tracepoint->provider_name, |
989 | location_tracepoint_comm.provider_name_len); | |
990 | if (ret) { | |
991 | ret = -LTTNG_ERR_INVALID; | |
992 | goto end; | |
993 | } | |
994 | ret = lttng_dynamic_buffer_append(buffer, | |
995 | location_tracepoint->binary_path, | |
996 | location_tracepoint_comm.binary_path_len); | |
1ce46cfe JG |
997 | if (ret) { |
998 | ret = -LTTNG_ERR_INVALID; | |
999 | goto end; | |
1000 | } | |
1001 | } | |
f4d0bb2e FD |
1002 | ret = sizeof(location_tracepoint_comm) + |
1003 | location_tracepoint_comm.probe_name_len + | |
1004 | location_tracepoint_comm.provider_name_len + | |
1005 | location_tracepoint_comm.binary_path_len; | |
1ce46cfe JG |
1006 | end: |
1007 | return ret; | |
1008 | } | |
1009 | ||
1010 | LTTNG_HIDDEN | |
1011 | int lttng_userspace_probe_location_serialize( | |
1012 | const struct lttng_userspace_probe_location *location, | |
1013 | struct lttng_dynamic_buffer *buffer, | |
1014 | int *binary_fd) | |
1015 | { | |
1016 | int ret, buffer_use = 0; | |
1017 | struct lttng_userspace_probe_location_comm location_generic_comm; | |
1018 | ||
1019 | if (!location) { | |
1020 | ERR("Invalid argument(s)"); | |
1021 | ret = -LTTNG_ERR_INVALID; | |
1022 | goto end; | |
1023 | } | |
1024 | ||
56f0bc67 JG |
1025 | memset(&location_generic_comm, 0, sizeof(location_generic_comm)); |
1026 | ||
1ce46cfe JG |
1027 | location_generic_comm.type = (int8_t) location->type; |
1028 | if (buffer) { | |
1029 | ret = lttng_dynamic_buffer_append(buffer, &location_generic_comm, | |
1030 | sizeof(location_generic_comm)); | |
1031 | if (ret) { | |
1032 | goto end; | |
1033 | } | |
1034 | } | |
1035 | buffer_use += sizeof(location_generic_comm); | |
1036 | ||
1037 | switch (lttng_userspace_probe_location_get_type(location)) { | |
1038 | case LTTNG_USERSPACE_PROBE_LOCATION_TYPE_FUNCTION: | |
1039 | ret = lttng_userspace_probe_location_function_serialize( | |
1040 | location, buffer, binary_fd); | |
1041 | break; | |
f4d0bb2e FD |
1042 | case LTTNG_USERSPACE_PROBE_LOCATION_TYPE_TRACEPOINT: |
1043 | ret = lttng_userspace_probe_location_tracepoint_serialize( | |
1044 | location, buffer, binary_fd); | |
1045 | break; | |
1ce46cfe JG |
1046 | default: |
1047 | ERR("Unsupported probe location type"); | |
1048 | ret = -LTTNG_ERR_INVALID; | |
1049 | goto end; | |
1050 | } | |
1051 | if (ret < 0) { | |
1052 | goto end; | |
1053 | } | |
1054 | buffer_use += ret; | |
1055 | ||
1056 | ret = lttng_userspace_probe_location_lookup_method_serialize( | |
1057 | location->lookup_method, buffer); | |
1058 | if (ret < 0) { | |
1059 | goto end; | |
1060 | } | |
1061 | ret += buffer_use; | |
1062 | end: | |
1063 | return ret; | |
1064 | } | |
1065 | ||
1066 | static | |
1067 | int lttng_userspace_probe_location_function_create_from_buffer( | |
1068 | const struct lttng_buffer_view *buffer, | |
1069 | struct lttng_userspace_probe_location **location) | |
1070 | { | |
1071 | struct lttng_userspace_probe_location_function_comm *location_function_comm; | |
1072 | const char *function_name_src, *binary_path_src; | |
1073 | char *function_name = NULL, *binary_path = NULL; | |
1074 | int ret = 0; | |
1075 | ||
1076 | assert(buffer); | |
1077 | assert(buffer->data); | |
1078 | assert(location); | |
1079 | ||
1080 | location_function_comm = | |
1081 | (struct lttng_userspace_probe_location_function_comm *) buffer->data; | |
1082 | ||
1083 | const size_t expected_size = sizeof(*location_function_comm) + | |
1084 | location_function_comm->function_name_len + | |
1085 | location_function_comm->binary_path_len; | |
1086 | ||
1087 | if (buffer->size < expected_size) { | |
1088 | ret = -LTTNG_ERR_INVALID; | |
1089 | goto end; | |
1090 | } | |
1091 | ||
1092 | function_name_src = buffer->data + sizeof(*location_function_comm); | |
1093 | binary_path_src = function_name_src + | |
1094 | location_function_comm->function_name_len; | |
1095 | ||
1096 | if (function_name_src[location_function_comm->function_name_len - 1] != '\0') { | |
1097 | ret = -LTTNG_ERR_INVALID; | |
1098 | goto end; | |
1099 | } | |
1100 | if (binary_path_src[location_function_comm->binary_path_len - 1] != '\0') { | |
1101 | ret = -LTTNG_ERR_INVALID; | |
1102 | goto end; | |
1103 | } | |
1104 | ||
1105 | function_name = lttng_strndup(function_name_src, LTTNG_SYMBOL_NAME_LEN); | |
1106 | if (!function_name) { | |
1107 | PERROR("lttng_strndup"); | |
1108 | goto end; | |
1109 | } | |
1110 | ||
1111 | binary_path = lttng_strndup(binary_path_src, LTTNG_PATH_MAX); | |
1112 | if (!binary_path) { | |
1113 | PERROR("lttng_strndup"); | |
1114 | goto end; | |
1115 | } | |
1116 | ||
1117 | *location = lttng_userspace_probe_location_function_create_no_check( | |
1118 | binary_path, function_name, NULL, false); | |
1119 | if (!(*location)) { | |
1120 | ret = -LTTNG_ERR_INVALID; | |
1121 | goto end; | |
1122 | } | |
1123 | ||
1124 | ret = (int) expected_size; | |
1125 | end: | |
1126 | free(function_name); | |
1127 | free(binary_path); | |
1128 | return ret; | |
1129 | } | |
1130 | ||
f4d0bb2e FD |
1131 | static |
1132 | int lttng_userspace_probe_location_tracepoint_create_from_buffer( | |
1133 | const struct lttng_buffer_view *buffer, | |
1134 | struct lttng_userspace_probe_location **location) | |
1135 | { | |
1136 | struct lttng_userspace_probe_location_tracepoint_comm *location_tracepoint_comm; | |
1137 | const char *probe_name_src, *provider_name_src, *binary_path_src; | |
1138 | char *probe_name = NULL, *provider_name = NULL, *binary_path = NULL; | |
1139 | int ret = 0; | |
1140 | ||
1141 | assert(buffer); | |
1142 | assert(buffer->data); | |
1143 | assert(location); | |
1144 | ||
1145 | location_tracepoint_comm = | |
1146 | (struct lttng_userspace_probe_location_tracepoint_comm *) buffer->data; | |
1147 | ||
1148 | const size_t expected_size = sizeof(*location_tracepoint_comm) + | |
1149 | location_tracepoint_comm->probe_name_len + | |
1150 | location_tracepoint_comm->provider_name_len + | |
1151 | location_tracepoint_comm->binary_path_len; | |
1152 | ||
1153 | if (buffer->size < expected_size) { | |
1154 | ret = -LTTNG_ERR_INVALID; | |
1155 | goto end; | |
1156 | } | |
1157 | ||
1158 | probe_name_src = buffer->data + sizeof(*location_tracepoint_comm); | |
1159 | provider_name_src = probe_name_src + | |
1160 | location_tracepoint_comm->probe_name_len; | |
1161 | binary_path_src = provider_name_src + | |
1162 | location_tracepoint_comm->provider_name_len; | |
1163 | ||
1164 | if (probe_name_src[location_tracepoint_comm->probe_name_len - 1] != '\0') { | |
1165 | ret = -LTTNG_ERR_INVALID; | |
1166 | goto end; | |
1167 | } | |
1168 | ||
1169 | if (provider_name_src[location_tracepoint_comm->provider_name_len - 1] != '\0') { | |
1170 | ret = -LTTNG_ERR_INVALID; | |
1171 | goto end; | |
1172 | } | |
1173 | ||
1174 | if (binary_path_src[location_tracepoint_comm->binary_path_len - 1] != '\0') { | |
1175 | ret = -LTTNG_ERR_INVALID; | |
1176 | goto end; | |
1177 | } | |
1178 | ||
1179 | probe_name = lttng_strndup(probe_name_src, LTTNG_SYMBOL_NAME_LEN); | |
1180 | if (!probe_name) { | |
1181 | PERROR("lttng_strndup"); | |
1182 | goto end; | |
1183 | } | |
1184 | provider_name = lttng_strndup(provider_name_src, LTTNG_SYMBOL_NAME_LEN); | |
1185 | if (!provider_name) { | |
1186 | PERROR("lttng_strndup"); | |
1187 | goto end; | |
1188 | } | |
1189 | ||
1190 | binary_path = lttng_strndup(binary_path_src, LTTNG_SYMBOL_NAME_LEN); | |
1191 | if (!binary_path) { | |
1192 | PERROR("lttng_strndup"); | |
1193 | goto end; | |
1194 | } | |
1195 | ||
1196 | *location = lttng_userspace_probe_location_tracepoint_create_no_check( | |
1197 | binary_path, provider_name, probe_name, NULL, false); | |
1198 | if (!(*location)) { | |
1199 | ret = -LTTNG_ERR_INVALID; | |
1200 | goto end; | |
1201 | } | |
1202 | ||
1203 | ret = (int) expected_size; | |
1204 | end: | |
1205 | free(probe_name); | |
1206 | free(provider_name); | |
1207 | free(binary_path); | |
1208 | return ret; | |
1209 | } | |
1210 | ||
1ce46cfe JG |
1211 | static |
1212 | int lttng_userspace_probe_location_lookup_method_create_from_buffer( | |
1213 | struct lttng_buffer_view *buffer, | |
1214 | struct lttng_userspace_probe_location_lookup_method **lookup_method) | |
1215 | { | |
1216 | int ret; | |
1217 | struct lttng_userspace_probe_location_lookup_method_comm *lookup_comm; | |
1218 | enum lttng_userspace_probe_location_lookup_method_type type; | |
1219 | ||
1220 | assert(buffer); | |
1221 | assert(buffer->data); | |
1222 | assert(lookup_method); | |
1223 | ||
1224 | if (buffer->size < sizeof(*lookup_comm)) { | |
1225 | ret = -LTTNG_ERR_INVALID; | |
1226 | goto end; | |
1227 | } | |
1228 | ||
1229 | lookup_comm = (struct lttng_userspace_probe_location_lookup_method_comm *) | |
1230 | buffer->data; | |
1231 | type = (enum lttng_userspace_probe_location_lookup_method_type) | |
1232 | lookup_comm->type; | |
1233 | switch (type) { | |
1234 | case LTTNG_USERSPACE_PROBE_LOCATION_LOOKUP_METHOD_TYPE_FUNCTION_DEFAULT: | |
1235 | *lookup_method = NULL; | |
1236 | break; | |
1237 | case LTTNG_USERSPACE_PROBE_LOCATION_LOOKUP_METHOD_TYPE_FUNCTION_ELF: | |
1238 | *lookup_method = | |
1239 | lttng_userspace_probe_location_lookup_method_function_elf_create(); | |
1240 | if (!(*lookup_method)) { | |
1241 | ret = -LTTNG_ERR_INVALID; | |
1242 | goto end; | |
1243 | } | |
1244 | break; | |
f4d0bb2e FD |
1245 | case LTTNG_USERSPACE_PROBE_LOCATION_LOOKUP_METHOD_TYPE_TRACEPOINT_SDT: |
1246 | *lookup_method = | |
1247 | lttng_userspace_probe_location_lookup_method_tracepoint_sdt_create(); | |
1248 | if (!(*lookup_method)) { | |
1249 | ret = -LTTNG_ERR_INVALID; | |
1250 | goto end; | |
1251 | } | |
1252 | break; | |
1ce46cfe JG |
1253 | default: |
1254 | ret = -LTTNG_ERR_INVALID; | |
1255 | goto end; | |
1256 | } | |
1257 | ||
1258 | ret = sizeof(*lookup_comm); | |
1259 | end: | |
1260 | return ret; | |
1261 | } | |
1262 | ||
1263 | LTTNG_HIDDEN | |
1264 | int lttng_userspace_probe_location_create_from_buffer( | |
1265 | const struct lttng_buffer_view *buffer, | |
1266 | struct lttng_userspace_probe_location **location) | |
1267 | { | |
1268 | struct lttng_userspace_probe_location_lookup_method *lookup_method; | |
1269 | struct lttng_userspace_probe_location_comm *probe_location_comm; | |
1270 | enum lttng_userspace_probe_location_type type; | |
1271 | struct lttng_buffer_view lookup_method_view; | |
1272 | int consumed = 0; | |
1273 | int ret; | |
1274 | ||
1275 | ||
1276 | assert(buffer); | |
1277 | assert(buffer->data); | |
1278 | assert(location); | |
1279 | ||
1280 | lookup_method = NULL; | |
1281 | ||
1282 | if (buffer->size <= sizeof(*probe_location_comm)) { | |
1283 | ret = -LTTNG_ERR_INVALID; | |
1284 | goto end; | |
1285 | } | |
1286 | ||
1287 | probe_location_comm = | |
1288 | (struct lttng_userspace_probe_location_comm *) buffer->data; | |
1289 | type = (enum lttng_userspace_probe_location_type) probe_location_comm->type; | |
1290 | consumed += sizeof(*probe_location_comm); | |
1291 | ||
1292 | switch (type) { | |
1293 | case LTTNG_USERSPACE_PROBE_LOCATION_TYPE_FUNCTION: | |
1294 | { | |
1295 | struct lttng_buffer_view view = lttng_buffer_view_from_view( | |
1296 | buffer, consumed, buffer->size - consumed); | |
1297 | ||
1298 | ret = lttng_userspace_probe_location_function_create_from_buffer( | |
1299 | &view, location); | |
1300 | if (ret < 0) { | |
1301 | goto end; | |
1302 | } | |
1303 | break; | |
1304 | } | |
f4d0bb2e FD |
1305 | case LTTNG_USERSPACE_PROBE_LOCATION_TYPE_TRACEPOINT: |
1306 | { | |
1307 | struct lttng_buffer_view view = lttng_buffer_view_from_view( | |
1308 | buffer, consumed, buffer->size - consumed); | |
1309 | ||
1310 | ret = lttng_userspace_probe_location_tracepoint_create_from_buffer( | |
1311 | &view, location); | |
1312 | if (ret < 0) { | |
1313 | goto end; | |
1314 | } | |
1315 | break; | |
1316 | } | |
1ce46cfe JG |
1317 | default: |
1318 | ret = -LTTNG_ERR_INVALID; | |
1319 | goto end; | |
1320 | } | |
1321 | ||
1322 | consumed += ret; | |
1323 | if (buffer->size <= consumed) { | |
1324 | ret = -LTTNG_ERR_INVALID; | |
1325 | goto end; | |
1326 | } | |
1327 | ||
1328 | lookup_method_view = lttng_buffer_view_from_view(buffer, consumed, | |
1329 | buffer->size - consumed); | |
1330 | ret = lttng_userspace_probe_location_lookup_method_create_from_buffer( | |
1331 | &lookup_method_view, &lookup_method); | |
1332 | if (ret < 0) { | |
1333 | ret = -LTTNG_ERR_INVALID; | |
1334 | goto end; | |
1335 | } | |
1336 | ||
1337 | assert(lookup_method); | |
1338 | (*location)->lookup_method = lookup_method; | |
1339 | lookup_method = NULL; | |
1340 | ret += consumed; | |
1341 | end: | |
1342 | return ret; | |
1343 | } | |
1344 | ||
1345 | LTTNG_HIDDEN | |
1346 | int lttng_userspace_probe_location_function_set_binary_fd( | |
1347 | struct lttng_userspace_probe_location *location, int binary_fd) | |
1348 | { | |
1349 | int ret = 0; | |
1350 | struct lttng_userspace_probe_location_function *function_location; | |
1351 | ||
1352 | assert(location); | |
1353 | assert(location->type == LTTNG_USERSPACE_PROBE_LOCATION_TYPE_FUNCTION); | |
1354 | ||
1355 | function_location = container_of(location, | |
1356 | struct lttng_userspace_probe_location_function, parent); | |
1357 | if (function_location->binary_fd >= 0) { | |
1358 | ret = close(function_location->binary_fd); | |
1359 | if (ret) { | |
1360 | PERROR("close"); | |
1361 | ret = -LTTNG_ERR_INVALID; | |
1362 | goto end; | |
1363 | } | |
1364 | } | |
1365 | ||
1366 | function_location->binary_fd = binary_fd; | |
1367 | end: | |
1368 | return ret; | |
1369 | } | |
1370 | ||
f4d0bb2e FD |
1371 | LTTNG_HIDDEN |
1372 | int lttng_userspace_probe_location_tracepoint_set_binary_fd( | |
1373 | struct lttng_userspace_probe_location *location, int binary_fd) | |
1374 | { | |
1375 | int ret = 0; | |
1376 | struct lttng_userspace_probe_location_tracepoint *tracepoint_location; | |
1377 | ||
1378 | assert(location); | |
1379 | assert(location->type == LTTNG_USERSPACE_PROBE_LOCATION_TYPE_TRACEPOINT); | |
1380 | ||
1381 | tracepoint_location = container_of(location, | |
1382 | struct lttng_userspace_probe_location_tracepoint, parent); | |
1383 | if (tracepoint_location->binary_fd >= 0) { | |
1384 | ret = close(tracepoint_location->binary_fd); | |
1385 | if (ret) { | |
1386 | PERROR("close"); | |
1387 | ret = -LTTNG_ERR_INVALID; | |
1388 | goto end; | |
1389 | } | |
1390 | } | |
1391 | ||
1392 | tracepoint_location->binary_fd = binary_fd; | |
1393 | end: | |
1394 | return ret; | |
1395 | } | |
1396 | ||
1ce46cfe JG |
1397 | static |
1398 | int lttng_userspace_probe_location_function_flatten( | |
1399 | const struct lttng_userspace_probe_location *location, | |
1400 | struct lttng_dynamic_buffer *buffer) | |
1401 | { | |
1402 | struct lttng_userspace_probe_location_lookup_method_elf flat_lookup_method; | |
1403 | struct lttng_userspace_probe_location_function *probe_function; | |
1404 | struct lttng_userspace_probe_location_function flat_probe; | |
1405 | size_t function_name_len, binary_path_len; | |
1406 | size_t padding_needed = 0; | |
1407 | char *flat_probe_start; | |
1408 | int storage_needed = 0; | |
1409 | int ret; | |
1410 | ||
1411 | assert(location); | |
1412 | ||
1413 | if (location->lookup_method && location->lookup_method->type != | |
1414 | LTTNG_USERSPACE_PROBE_LOCATION_LOOKUP_METHOD_TYPE_FUNCTION_ELF) { | |
1415 | ret = -LTTNG_ERR_INVALID; | |
1416 | goto end; | |
1417 | } | |
1418 | ||
1419 | probe_function = container_of(location, | |
1420 | struct lttng_userspace_probe_location_function, | |
1421 | parent); | |
1422 | assert(probe_function->function_name); | |
1423 | assert(probe_function->binary_path); | |
1424 | ||
1425 | storage_needed += | |
1426 | sizeof(struct lttng_userspace_probe_location_function); | |
1427 | function_name_len = strlen(probe_function->function_name) + 1; | |
1428 | binary_path_len = strlen(probe_function->binary_path) + 1; | |
1429 | storage_needed += function_name_len + binary_path_len; | |
1430 | ||
1431 | /* | |
1432 | * The lookup method is aligned to 64-bit within the buffer. | |
1433 | * This is needed even if there is no lookup method since | |
1434 | * the next structure in the buffer probably needs to be | |
1435 | * aligned too (depending on the arch). | |
1436 | */ | |
1437 | padding_needed = ALIGN_TO(storage_needed, sizeof(uint64_t)) - storage_needed; | |
1438 | storage_needed += padding_needed; | |
1439 | ||
1440 | if (location->lookup_method) { | |
1441 | /* NOTE: elf look-up method is assumed here. */ | |
1442 | storage_needed += sizeof(struct lttng_userspace_probe_location_lookup_method_elf); | |
1443 | } | |
1444 | ||
1445 | if (!buffer) { | |
1446 | ret = storage_needed; | |
1447 | goto end; | |
1448 | } | |
1449 | ||
1450 | if (lttng_dynamic_buffer_get_capacity_left(buffer) < storage_needed) { | |
1451 | ret = lttng_dynamic_buffer_set_capacity(buffer, | |
1452 | buffer->size + storage_needed); | |
1453 | if (ret) { | |
1454 | goto end; | |
1455 | } | |
1456 | } | |
1457 | ||
1458 | memset(&flat_probe, 0, sizeof(flat_probe)); | |
1459 | ||
1460 | flat_probe_start = buffer->data + buffer->size; | |
1461 | flat_probe.parent.type = location->type; | |
1462 | /* | |
1463 | * The lookup method, if present, is the last element in the flat | |
1464 | * representation of the probe. | |
1465 | */ | |
1466 | if (location->lookup_method) { | |
1467 | flat_probe.parent.lookup_method = | |
1468 | (struct lttng_userspace_probe_location_lookup_method *) | |
1469 | (flat_probe_start + sizeof(flat_probe) + | |
1470 | function_name_len + binary_path_len + padding_needed); | |
1471 | } else { | |
1472 | flat_probe.parent.lookup_method = NULL; | |
1473 | } | |
1474 | ||
1475 | flat_probe.function_name = flat_probe_start + sizeof(flat_probe); | |
1476 | flat_probe.binary_path = flat_probe.function_name + function_name_len; | |
1477 | flat_probe.binary_fd = -1; | |
1478 | ret = lttng_dynamic_buffer_append(buffer, &flat_probe, | |
1479 | sizeof(flat_probe)); | |
1480 | if (ret) { | |
1481 | goto end; | |
1482 | } | |
1483 | ||
1484 | ret = lttng_dynamic_buffer_append(buffer, | |
1485 | probe_function->function_name, function_name_len); | |
1486 | if (ret) { | |
1487 | goto end; | |
1488 | } | |
1489 | ret = lttng_dynamic_buffer_append(buffer, | |
1490 | probe_function->binary_path, binary_path_len); | |
1491 | if (ret) { | |
1492 | goto end; | |
1493 | } | |
1494 | ||
1495 | /* Insert padding before the lookup method. */ | |
1496 | ret = lttng_dynamic_buffer_set_size(buffer, | |
1497 | buffer->size + padding_needed); | |
1498 | if (ret) { | |
1499 | goto end; | |
1500 | } | |
1501 | ||
1502 | if (!location->lookup_method) { | |
1503 | /* Not an error, the default method is used. */ | |
1504 | ret = storage_needed; | |
1505 | goto end; | |
1506 | } | |
1507 | ||
1508 | memset(&flat_lookup_method, 0, sizeof(flat_lookup_method)); | |
1509 | flat_lookup_method.parent.type = | |
1510 | LTTNG_USERSPACE_PROBE_LOCATION_LOOKUP_METHOD_TYPE_FUNCTION_ELF; | |
1511 | ret = lttng_dynamic_buffer_append(buffer, | |
1512 | &flat_lookup_method, sizeof(flat_lookup_method)); | |
1513 | if (ret) { | |
1514 | goto end; | |
1515 | } | |
1516 | ret = storage_needed; | |
1517 | end: | |
1518 | return ret; | |
1519 | } | |
1520 | ||
f4d0bb2e FD |
1521 | static |
1522 | int lttng_userspace_probe_location_tracepoint_flatten( | |
1523 | const struct lttng_userspace_probe_location *location, | |
1524 | struct lttng_dynamic_buffer *buffer) | |
1525 | { | |
1526 | struct lttng_userspace_probe_location_lookup_method_sdt flat_lookup_method; | |
1527 | struct lttng_userspace_probe_location_tracepoint *probe_tracepoint; | |
1528 | struct lttng_userspace_probe_location_tracepoint flat_probe; | |
1529 | size_t probe_name_len, provider_name_len, binary_path_len; | |
1530 | size_t padding_needed = 0; | |
1531 | int storage_needed = 0; | |
1532 | char *flat_probe_start; | |
1533 | int ret = 0; | |
1534 | ||
1535 | assert(location); | |
1536 | ||
1537 | /* Only SDT tracepoints are supported at the moment */ | |
1538 | if (location->lookup_method && location->lookup_method->type != | |
1539 | LTTNG_USERSPACE_PROBE_LOCATION_LOOKUP_METHOD_TYPE_TRACEPOINT_SDT) { | |
1540 | ret = -LTTNG_ERR_INVALID; | |
1541 | goto end; | |
1542 | } | |
1543 | probe_tracepoint = container_of(location, | |
1544 | struct lttng_userspace_probe_location_tracepoint, | |
1545 | parent); | |
1546 | assert(probe_tracepoint->probe_name); | |
1547 | assert(probe_tracepoint->provider_name); | |
1548 | assert(probe_tracepoint->binary_path); | |
1549 | ||
1550 | /* Compute the storage space needed to flatten the probe location */ | |
1551 | storage_needed += sizeof(struct lttng_userspace_probe_location_tracepoint); | |
1552 | ||
1553 | probe_name_len = strlen(probe_tracepoint->probe_name) + 1; | |
1554 | provider_name_len = strlen(probe_tracepoint->provider_name) + 1; | |
1555 | binary_path_len = strlen(probe_tracepoint->binary_path) + 1; | |
1556 | ||
1557 | storage_needed += probe_name_len + provider_name_len + binary_path_len; | |
1558 | ||
1559 | /* | |
1560 | * The lookup method is aligned to 64-bit within the buffer. | |
1561 | * This is needed even if there is no lookup method since | |
1562 | * the next structure in the buffer probably needs to be | |
1563 | * aligned too (depending on the arch). | |
1564 | */ | |
1565 | padding_needed = ALIGN_TO(storage_needed, sizeof(uint64_t)) - storage_needed; | |
1566 | storage_needed += padding_needed; | |
1567 | ||
1568 | if (location->lookup_method) { | |
1569 | /* NOTE: elf look-up method is assumed here. */ | |
1570 | storage_needed += | |
1571 | sizeof(struct lttng_userspace_probe_location_lookup_method_elf); | |
1572 | } | |
1573 | ||
1574 | /* | |
1575 | * If the caller set buffer to NULL, return the size of the needed buffer. | |
1576 | */ | |
1577 | if (!buffer) { | |
1578 | ret = storage_needed; | |
1579 | goto end; | |
1580 | } | |
1581 | ||
1582 | if (lttng_dynamic_buffer_get_capacity_left(buffer) < storage_needed) { | |
1583 | ret = lttng_dynamic_buffer_set_capacity(buffer, | |
1584 | buffer->size + storage_needed); | |
1585 | if (ret) { | |
1586 | goto end; | |
1587 | } | |
1588 | } | |
1589 | ||
1590 | memset(&flat_probe, 0, sizeof(flat_probe)); | |
1591 | ||
1592 | flat_probe_start = buffer->data + buffer->size; | |
1593 | flat_probe.parent.type = location->type; | |
1594 | ||
1595 | /* | |
1596 | * The lookup method, if present, is the last element in the flat | |
1597 | * representation of the probe. | |
1598 | */ | |
1599 | if (location->lookup_method) { | |
1600 | flat_probe.parent.lookup_method = | |
1601 | (struct lttng_userspace_probe_location_lookup_method *) | |
1602 | (flat_probe_start + sizeof(flat_probe) + | |
1603 | probe_name_len + provider_name_len + | |
1604 | binary_path_len + padding_needed); | |
1605 | } else { | |
1606 | flat_probe.parent.lookup_method = NULL; | |
1607 | } | |
1608 | ||
1609 | flat_probe.probe_name = flat_probe_start + sizeof(flat_probe); | |
1610 | flat_probe.provider_name = flat_probe.probe_name + probe_name_len; | |
1611 | flat_probe.binary_path = flat_probe.provider_name + provider_name_len; | |
1612 | flat_probe.binary_fd = -1; | |
1613 | ret = lttng_dynamic_buffer_append(buffer, &flat_probe, sizeof(flat_probe)); | |
1614 | if (ret) { | |
1615 | goto end; | |
1616 | } | |
1617 | ||
1618 | /* Append all the fields to the buffer */ | |
1619 | ret = lttng_dynamic_buffer_append(buffer, | |
1620 | probe_tracepoint->probe_name, probe_name_len); | |
1621 | if (ret) { | |
1622 | goto end; | |
1623 | } | |
1624 | ret = lttng_dynamic_buffer_append(buffer, | |
1625 | probe_tracepoint->provider_name, provider_name_len); | |
1626 | if (ret) { | |
1627 | goto end; | |
1628 | } | |
1629 | ret = lttng_dynamic_buffer_append(buffer, | |
1630 | probe_tracepoint->binary_path, binary_path_len); | |
1631 | if (ret) { | |
1632 | goto end; | |
1633 | } | |
1634 | ||
1635 | /* Insert padding before the lookup method. */ | |
1636 | ret = lttng_dynamic_buffer_set_size(buffer, buffer->size + padding_needed); | |
1637 | if (ret) { | |
1638 | goto end; | |
1639 | } | |
1640 | ||
1641 | if (!location->lookup_method) { | |
1642 | /* Not an error, the default method is used. */ | |
1643 | ret = storage_needed; | |
1644 | goto end; | |
1645 | } | |
1646 | ||
1647 | memset(&flat_lookup_method, 0, sizeof(flat_lookup_method)); | |
1648 | ||
1649 | flat_lookup_method.parent.type = | |
1650 | LTTNG_USERSPACE_PROBE_LOCATION_LOOKUP_METHOD_TYPE_TRACEPOINT_SDT; | |
1651 | ret = lttng_dynamic_buffer_append(buffer, | |
1652 | &flat_lookup_method, sizeof(flat_lookup_method)); | |
1653 | if (ret) { | |
1654 | goto end; | |
1655 | } | |
1656 | ret = storage_needed; | |
1657 | end: | |
1658 | return ret; | |
1659 | } | |
1660 | ||
1ce46cfe JG |
1661 | LTTNG_HIDDEN |
1662 | int lttng_userspace_probe_location_flatten( | |
1663 | const struct lttng_userspace_probe_location *location, | |
1664 | struct lttng_dynamic_buffer *buffer) | |
1665 | { | |
1666 | int ret; | |
1667 | if (!location) { | |
1668 | ret = -LTTNG_ERR_INVALID; | |
1669 | goto end; | |
1670 | } | |
1671 | ||
1672 | /* Only types currently supported. */ | |
1673 | switch (location->type) { | |
1674 | case LTTNG_USERSPACE_PROBE_LOCATION_TYPE_FUNCTION: | |
1675 | ret = lttng_userspace_probe_location_function_flatten(location, buffer); | |
1676 | break; | |
f4d0bb2e FD |
1677 | case LTTNG_USERSPACE_PROBE_LOCATION_TYPE_TRACEPOINT: |
1678 | ret = lttng_userspace_probe_location_tracepoint_flatten(location, buffer); | |
1679 | break; | |
1ce46cfe JG |
1680 | default: |
1681 | ret = -LTTNG_ERR_INVALID; | |
1682 | goto end; | |
1683 | } | |
1684 | ||
1685 | end: | |
1686 | return ret; | |
1687 | } | |
394357fe FD |
1688 | |
1689 | LTTNG_HIDDEN | |
1690 | struct lttng_userspace_probe_location *lttng_userspace_probe_location_copy( | |
1691 | const struct lttng_userspace_probe_location *location) | |
1692 | { | |
1693 | struct lttng_userspace_probe_location *new_location = NULL; | |
1694 | enum lttng_userspace_probe_location_type type; | |
1695 | ||
1696 | if (!location) { | |
1697 | goto err; | |
1698 | } | |
1699 | ||
1700 | type = lttng_userspace_probe_location_get_type(location); | |
1701 | switch (type) { | |
1702 | case LTTNG_USERSPACE_PROBE_LOCATION_TYPE_FUNCTION: | |
1703 | new_location = | |
1704 | lttng_userspace_probe_location_function_copy(location); | |
1705 | if (!new_location) { | |
1706 | goto err; | |
1707 | } | |
1708 | break; | |
f4d0bb2e FD |
1709 | case LTTNG_USERSPACE_PROBE_LOCATION_TYPE_TRACEPOINT: |
1710 | new_location = | |
1711 | lttng_userspace_probe_location_tracepoint_copy(location); | |
1712 | if (!new_location) { | |
1713 | goto err; | |
1714 | } | |
1715 | break; | |
394357fe FD |
1716 | default: |
1717 | new_location = NULL; | |
1718 | goto err; | |
1719 | } | |
1720 | err: | |
1721 | return new_location; | |
1722 | } |